B300D44A102XXG ON Semiconductor, B300D44A102XXG Datasheet - Page 11

• Manufacturer Part Number: B300D44A102XXG
• Description: IC PROCESSOR AUDIO 24BIT 44DFN
• Manufacturer: ON Semiconductor
• Series: BelaSigna® 300r
• Type: Audio Processorr

Specifications of B300D44A102XXG

• Applications: Portable Equipment
• Mounting Type: Surface Mount
• Package / Case: 44-VFDFN
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: B300D44A102XXG; B300D44A102XXGOSTR

Audio Inputs
input impedance of each audio input pad (e.g., AI0, AI1,
AI2, AI3, AI4) is high (approximately 500 kW); therefore a
10 nF capacitor is sufficient to decouple the DC bias. This
capacitor and the internal resistance form a first−order
analog high pass filter whose cutoff frequency can be
calculated by f
~30 Hz for a 10 nF capacitor. This 10 nF capacitor value
applies when the preamplifier is being used, in other words,
when a non−unity gain is applied to the signals. When the
preamplifier is by−passed, the impedance is reduced; hence,
the cut−off frequency of the resulting high−pass filter could
be too high. In such a case, the use of a 30−40 nF serial
capacitor is recommended. In cases where line−level analog
inputs without DC bias are used, the capacitor may be
omitted for transparent bass response.
Table 10. NON−CRITICAL SIGNALS
Table 11. RECOMMENDATIONS FOR UNUSED PADS
CAP0, CAP1
SDA, SCL
GPIO[3..0]
UART_RX, UART_TX
PCM_FRAME, PCM_CLK, PCM_OUT,
PCM_IN
LSAD[4..1]
SPI_CLK, SPI_CS, SPI_SERI, SPI_SERO
The audio input traces should be as short as possible. The
WLCSP Ball Index
D14
C13
D12
A11
N/A
B12
A13
B14
E13
E11
B2
C3
A3
B4
E9
E7
C7
3dB
Pin Name
(Hz) = 1/(R x C x 2π), which results in
DFN Pin Index
20
19
18
17
44
43
42
41
40
35
32
31
7
6
4
3
1
RCVR_HP+
RCVR+
RCVR−
RCVR_HP−
AI4
AI3/LOUT3
AI2/LOUT2
AI1/LOUT1
AI0/LOUT0
GPIO[4]/LSAD[4]
GPIO[3]/LSAD[3]
GPIO[2]/LSAD[2]
GPIO[1]/LSAD[1]/UART−RX
GPIO[0]/UART−TX
EXT_CLK
SPI_CLK
SPI_SERI
BelaSigna 300 Signal Name
Internal charge pump − capacitor connection
I2C port
General−purpose I/O
General−purpose UART
PCM port
Low−speed A/D converters
Serial peripheral interface port
Connect to EEPROM
http://onsemi.com
Description
11
package option.
(VREG) and ground (AGND). Keep audio input traces
strictly away from output traces. A 2.0 V microphone bias
might also be provided by the VDBL power supply.
microphone inputs to avoid cross−coupling.
Audio Outputs
trace length of RCVR+ and RCVR− should be
approximately the same to provide matched impedances.
Recommendation for Unused Pins
when they are not used.
The audio input pad AI3 is not available on the WLCSP
BelaSigna 300 provides microphone power supply
Digital outputs (RCVR) MUST be kept away from
The audio output traces should be as short as possible. The
The table below shows the recommendation for each pin
Do not connect
Do not connect
Do not connect
Do not connect
Connect to AGND
Connect to AGND
Connect to AGND
Connect to AGND
Connect to AGND
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Recommended Connection when Not Used
Place 100 nF capacitor close to pins
Keep as short as possible
Not critical
Not critical
Keep away from analog input lines
Not critical
Keep away from analog input lines
Routing Guideline